Re: [Xen-users] XenSerialConsole help + GRUB2 (Machine locks up on boot)

[Pasi Kärkkäinen <pasik@xxxxxx>]

On Sat, Apr 10, 2010 at 10:03:51AM -0400, Mike Viau wrote:
>    Hello,
> 
>    I am trying to setup a Xen serial console for easily debugging the full
>    kernel boot messages even if it crashes with the help from the following
>    wiki pages:
> 
>    [1]http://wiki.xensource.com/xenwiki/XenSerialConsole
>    [2]http://wiki.xensource.com/xenwiki/XenParavirtOps
> 
>    I noticed the wiki was written for use with grub legacy.
>

I wouldn't call grub1 legacy since it's still used by most of the distros :)

> Therefore I am
>    not certain if the serial console issue is with the way the grub2 package
>    implemented serial consoles.
> 
>    My problem is the machine locks up on boot after printing the messages:
> 
>      (XEN) Xen trace buffers: disabled
>      (XEN) Std. Loglevel: All
>      (XEN) Guest Loglevel: All
>      (XEN) **********************************************
>      (XEN) ******* WARNING: CONSOLE OUTPUT IS SYNCHRONOUS
>      (XEN) ******* This option is intended to aid debugging of Xen by ensuring
>      (XEN) ******* that all output is synchronously delivered on the serial 
> line.
>      (XEN) ******* However it can introduce SIGNIFICANT latencies and affect
>      (XEN) ******* timekeeping. It is NOT recommended for production use!
>      (XEN) **********************************************
>      (XEN) 3... 2... 1...
>


Can you please paste the full boot messages before it locks up? 

 
>    After that I just get a blank screen with a blinking "_" prompt at the top
>    left hand corner of the screen. I understand that this message should not
>    alone cause the kernel to stop booting at the output was actually found on
>    another thread at:
>    [3]http://lists.xensource.com/archives/html/xen-devel/2010-04/msg00340.html
> 
>    Does any have a non-standard PCI serial port Xen serial console working
>    with grub2? What does your /etc/default/grub file and menuentrys look
>    like? What does your /etc/inittab look like?
> 
>    My motherboard does not have a serial port or even serial headers
>    connectors on the board. Therefor I purchased an add-in serial card to
>    obtain serial ports on the machine.
> 
>    Motherboard:
>    
> [4]http://www.intel.com/products/desktop/motherboards/DP55WG/DP55WG-overview.htm
>    [5]http://ark.intel.com/Product.aspx?id=40078
> 
>    Add-in serial card:
>    "Cables Unlimited IOC-2200 2-Port DB9 Serial PCI I/O Card"
>    
> [6](http://www.tigerdirect.ca/applications/SearchTools/item-details.asp?EdpNo=1431863&CatId=1422)
> 

Does the serial console work with plain baremetal Linux? (without Xen).



>    My GRUB2 configuration files are also attached from:
> 
>    /etc/default/grub
>    /boot/grub/grub.cfg (trying to boot "Setting up Xen 4.0.0 / PVOPS
>    2.6.32-4-xen-amd64 with a serial console" entry)
> 
>    Lastly a snippet from lspci -vvv
> 
>    05:01.0 Serial controller: NetMos Technology Device 9865 (prog-if 02
>    [16550])
>        Subsystem: Device a000:1000
>        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
>    Stepping- SERR- FastB2B- DisINTx-
>        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
>    <TAbort- <MAbort- >SERR- <PERR- INTx-
>        Interrupt: pin A routed to IRQ 22
>        Region 0: I/O ports at 1008 [size=8]


So the first port has IO port 0x1008 and uses IRQ 22.

-- Pasi

>        Region 1: Memory at f0007000 (32-bit, non-prefetchable) [size=4K]
>        Region 4: Memory at f0006000 (32-bit, non-prefetchable) [size=4K]
>        Capabilities: [48] Power Management version 2
>            Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
>    PME(D0+,D1+,D2+,D3hot+,D3cold+)
>            Status: D0 PME-Enable- DSel=0 DScale=1 PME-
> 
>    05:01.1 Serial controller: NetMos Technology Device 9865 (prog-if 02
>    [16550])
>        Subsystem: Device a000:1000
>        Control: I/O+ Mem+ BusMaster- SpecCycle- MemWINV- VGASnoop- ParErr-
>    Stepping- SERR- FastB2B- DisINTx-
>        Status: Cap+ 66MHz- UDF- FastB2B+ ParErr- DEVSEL=medium >TAbort-
>    <TAbort- <MAbort- >SERR- <PERR- INTx-
>        Interrupt: pin B routed to IRQ 21
>        Region 0: I/O ports at 1000 [size=8]
>        Region 1: Memory at f0005000 (32-bit, non-prefetchable) [size=4K]
>        Region 4: Memory at f0004000 (32-bit, non-prefetchable) [size=4K]
>        Capabilities: [48] Power Management version 2
>            Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=375mA
>    PME(D0+,D1+,D2+,D3hot+,D3cold+)
>            Status: D0 PME-Enable- DSel=0 DScale=1 PME-
> 
> 
>    Thanks for looking!
> 
>    -M
> 


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